Kelvin to Celsius Converter
Convert Kelvin to Celsius (K to °C) instantly, with the formula and a table of common values. Free, runs in your browser, nothing uploaded.
Everything happens on your own device. Nothing you type is ever sent anywhere.
Category
Result
-272.15 °C
Formula
°C = K − 273.15
Common Kelvin to Celsius Conversions
| Kelvin | Celsius |
|---|---|
| -40 K | -313.15 °C |
| -20 K | -293.15 °C |
| -10 K | -283.15 °C |
| 0 K | -273.15 °C |
| 20 K | -253.15 °C |
| 25 K | -248.15 °C |
| 37 K | -236.15 °C |
| 50 K | -223.15 °C |
| 100 K | -173.15 °C |
This converter handles eight common unit categories - length, weight, temperature, volume, area, speed, data storage, and time - and updates the result instantly as you type, entirely in your browser. Most categories convert by a fixed ratio to a base unit (like meters for length or bytes for data), except temperature, which needs its own formula since 0°C isn't 0°F or 0 K.
Frequently asked questions
How do I convert Kelvin to Celsius?
Use the formula °C = K − 273.15. For example, 100 K = -173.15 °C.
How do I convert Celsius to Kelvin?
Use the formula K = °C + 273.15. For example, 100 °C = 373.15 K.
Is the value I enter sent anywhere?
No. The conversion runs entirely in your browser, so nothing you type ever leaves your device.